AIParkingApplication/AIParkingApplication/Util.cs

using Newtonsoft.Json;
using OpenCvSharp;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Net.Http;
using System.Net.NetworkInformation;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AIParkingApplication
{
    public static class Util
    {
        private static HttpClient httpClientEngine = new HttpClient { BaseAddress = new Uri("http://localhost:8080/"), Timeout = TimeSpan.FromMilliseconds(5000) };

        public static bool IsPingable(string destinationIPAddress, out long pingTime, int timeOut = UtilConstant.PING_TIMEOUT_MS)
        {
            var pingTask = Task.Factory.StartNew(async () =>
            {
                Ping pinger = new Ping();
                try
                {
                    PingReply reply = await pinger.SendPingAsync(destinationIPAddress, timeOut);
                    return reply;
                }
                catch (Exception)
                {
                    return null;
                }
                finally
                {
                    pinger.Dispose();
                }
            });

            var pingResult = pingTask.Result.Result;
            if (pingResult != null && pingResult.Status == IPStatus.Success)
            {
                pingTime = pingResult.RoundtripTime;
                return true;
            }
            else
            {
                pingTime = -1;
                return false;
            }
        }

        public static string GetCurrentMethodName()
        {
            var strackTrace = new StackTrace();
            var sf = strackTrace.GetFrame(1);
            return sf.GetMethod().Name;
        }

        public static async Task<OcrResult> SendEngineRequestAsync(Mat plateImage, PlateType plateType)
        {
            string plateImageBase64 = Convert.ToBase64String(plateImage.ToBytes());
            try
            {
                var request = new PlateRequestEngineModel
                {
                    Img64 = plateImageBase64,
                    Mode = plateType == PlateType.Square ? "square" : "long",
                    Display = "full"
                };
                HttpResponseMessage response = await httpClientEngine.PostAsJsonAsync("/get-from-frame", request);
                response.EnsureSuccessStatusCode();
                var ocrResult = await response.Content.ReadAsAsync<OcrResult>();
                return ocrResult;
            }
            catch (Exception ex)
            {
                Console.WriteLine($"SendEngineRequest : {ex.Message}");
                return new OcrResult();
            }
        }

        public static void UpdateImage(this PictureBox pictureBox, Bitmap image)
        {
            pictureBox.Invoke(new Action(() =>
            {
                pictureBox.Image?.Dispose();
                pictureBox.Image = image;
            }));
        }

        public static void UpdateLabel(this Label label, string text, Color color)
        {
            label.Invoke(new Action(() =>
            {
                label.BackColor = color;
                label.Text = text;
            }));
        }

        public static void UpdateLabel(this Label label, string text)
        {
            label.Invoke(new Action(() =>
            {
                label.Text = text;
            }));
        }
    }

    public class PlateRequestEngineModel
    {
        [JsonProperty("img64")]
        public string Img64 { get; set; }

        [JsonProperty("mode")]
        public string Mode { get; set; }

        [JsonProperty("display")]
        public string Display { get; set; }
    }

    public class OcrResult
    {
        [JsonProperty("ocr")]
        public string PlateString { get; set; }

        [JsonProperty("plate")]
        public string PlateImageBase64 { get; set; }
    }

    public static class UtilConstant
    {
        public const int PING_TIMEOUT_MS = 500;

        public const string HTTP_POST_METHOD = "POST";
        public const string HTTP_POST_CONTENTTYPE = "application/json";
    }
}